Manufacture of condensation products containing sulphur



. OSKAB SIPEiN'GLER AND ALFRED THURM,

Patented Aug. 28, 1928.

UNITED STATES PATENT OFFICE.

OF DESSAU IN ANHALT, GERMANY, AS-

SIGNORS TO I. G. FARBENINDUSTBIE AKTIENGESELLSCHAET, 0F FRANKIEOIl3,'.1-OI\l'- THE-MAIN, GERMZANY.

MANUFACTURE OF CONDENSATION PRODUCTS CONTAINING SULPHUR.

No Drawing. Application filed May 8, 1926, Serial No. 106,551, and in Germany May 28, 1925.

This invention relates to an improvement in or a'modification of that described in specification to U. S. Letters Patent 1,550,589. By the invention thereln de scribed condensation products containing sulphur are made by heating an arylsulpho chloride with an hydroxyaryl-compound.

According to the present invention simi.

Q 01018 00 OH are fused with 1 part of di-(2-ehlorphenyl)- carbonate of the formula The reaction begins at about 170 C. accompanied by much foaming. The temperature is gradually raised to 190-195 C. while stirring, until a test ortion is smoothly soluble in water. edark-coloured mass,- whieh is brittle when cold, dissolves easily in water. The nearly colourlcsssolution has an acid reaction and a slightly milky turbidity. It converts animal skin into a full white leather.

Example 2.5 parts of salicylic acid sulhochloride and 1 part of 1.3-dihydroxynzene diacetate are fused to 'ether. At a bath temperature above 160 elimination of acetic acid and hydrochloric acid begms.

' is gradually On further heatin the mass becomes thick, so that it can be E' rther worked only with difficulty. At a bath temperature of190- 195 C. the mass is soluble in water. The cooled, brittle mass is pulverized. The yellow-brown powder dissolves in water to .a-

O-iJ-CHI C0 OH heated to a bath tem 'erature of 175-180 (J. until a sample disso ves clearly in water. The condensation product which,

in the form of powder is yellowish brown and only slightly hygroscopic, dissolves in Water to a nearly colourless solution which converts animal skin into a greenish-yellow leather.

Example 5.-15 parts of salicylic acid sulphochloride and 7 parts of polysalicylide of the formula )X (cf. liichten organlsche Chemie, Vol. 11, page 322) containing sulphur being tanning materials forming in the dry puverized shape only slightly hygroscopic powders, dissolving in water, being obtained by reaction between an hydroxyaryl-carboxylic acid sulphochloride and an esterified hydroxyaryl compound.

2. Manufacture of condensation products containing sulphur being tanning materials forming in the dry pulverized shape only slightly hygroscopic powders, dissolving in water, being obtained by reaction between an hydroxyarylcarboxylic acid sulphochloride and an esterilied hydroxybenzene compound.

3. Manufacture of condensation products containing sulphur being tanning materials forming in the dry pulverized shape only slightly hygroscopic powders, dissolving in water, being obtained by reaction between an hydroxyaryl carboxylic acid sulphochloride and an acetylated hydroxybenzenc compound.

i. Manufacture of condensation products containing sulphur being tanning materials forming in the dry pulverized shape only slightly hygroscopic powders, dissolving in water. being obtained by reaction between salicylic acid sulphochloride and an acetylated hydroxybenzene compound.

Manufacture of a condcmaltion product containing sulphur being a tanning material forming in the dry pulverized shape an only slightly hygroscopic powder, dissolving in water, being obtained by reaction between salicylic acid sulphochloride and acetylsalicylic acid.

In testimony whereof we allix our signatures.

()SKAR SllCNt ilil llt. ALFRED 'lllUltM. 

